Gift of money for investment property not allowed?

[Shirley Wen]

I'm new to getting loan for my investment property. Recently signed a contract to purchase a duplex in TX. Most of my downpayment is in stocks. My family member gifted me a lump sum of money (because I want to keep several stocks and not sell them for awhile). My loan officer just told me that conventional federal guidelines do not allow a gift for a down payment on an investment property.

My question is, if I put the gifted money to buy stocks, then sell it and transfer back to my bank account within a week. Would they still consider this gifted money or just money from my own stocks?

Appreciate the help in advance :]